FileZilla Client version 3.1.0.1 fixes a minor security issue:
Quoting upstream news page:
FileZilla 3.1.0.1 fixes a vulnerability regarding the way some errors are
handled on SSL/TLS secured data transfers.
If the data connection of a transfer gets closed, FileZilla did not check if the
server performed an orderly TLS shutdown.
Impact:
An attacker could send spoofed FIN packets to the client. Even though GnuTLS
detects this with GNUTLS_E_UNEXPECTED_PACKET_LENGTH, FileZilla did not record a
transfer failure in all cases.
Unfortunately not all servers perform an orderly SSL/TLS shutdown. Since this
cannot be distinguished from an attack, FileZilla will not be able to download
listings or files from such servers.
Affected versions:
All versions prior to 3.1.0.1 are affected. This vulnerability has been fixed in
3.1.0.1
Reference:
http://filezilla-project.org/

filezilla-3.1.0.1-1.fc9 has been pushed to the Fedora 9 testing repository. If problems still persist, please make note of it in this bug report.
If you want to test the update, you can install it with
su -c 'yum --enablerepo=updates-testing update filezilla'. You can provide feedback for this update here: http://admin.fedoraproject.org/updates/F9/FEDORA-2008-6865